1 /**
2 * collectd - src/swap.c
3 * Copyright (C) 2005-2014 Florian octo Forster
4 * Copyright (C) 2009 Stefan Völkel
5 * Copyright (C) 2009 Manuel Sanmartin
6 * Copyright (C) 2010 Aurélien Reynaud
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; only version 2 of the License is applicable.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 *
21 * Authors:
22 * Florian octo Forster <octo at collectd.org>
23 * Manuel Sanmartin
24 * Aurélien Reynaud <collectd at wattapower.net>
25 **/
27 #if HAVE_CONFIG_H
28 #include "config.h"
29 #undef HAVE_CONFIG_H
30 #endif
31 /* avoid swap.h error "Cannot use swapctl in the large files compilation
32 * environment" */
33 #if HAVE_SYS_SWAP_H && !defined(_LP64) && _FILE_OFFSET_BITS == 64
34 #undef _FILE_OFFSET_BITS
35 #undef _LARGEFILE64_SOURCE
36 #endif
38 #include "collectd.h"
40 #include "common.h"
41 #include "plugin.h"
43 #if HAVE_SYS_SWAP_H
44 #include <sys/swap.h>
45 #endif
46 #if HAVE_VM_ANON_H
47 #include <vm/anon.h>
48 #endif
49 #if HAVE_SYS_PARAM_H
50 #include <sys/param.h>
51 #endif
52 #if HAVE_SYS_SYSCTL_H
53 #include <sys/sysctl.h>
54 #endif
55 #if HAVE_SYS_DKSTAT_H
56 #include <sys/dkstat.h>
57 #endif
58 #if HAVE_KVM_H
59 #include <kvm.h>
60 #endif
62 #if HAVE_STATGRAB_H
63 #include <statgrab.h>
64 #endif
66 #if HAVE_PERFSTAT
67 #include <libperfstat.h>
68 #include <sys/protosw.h>
69 #endif
71 #undef MAX
72 #define MAX(x, y) ((x) > (y) ? (x) : (y))
74 #if KERNEL_LINUX
75 #define SWAP_HAVE_REPORT_BY_DEVICE 1
76 static derive_t pagesize;
77 static _Bool report_bytes = 0;
78 static _Bool report_by_device = 0;
79 /* #endif KERNEL_LINUX */
81 #elif HAVE_SWAPCTL && HAVE_SWAPCTL_TWO_ARGS
82 #define SWAP_HAVE_REPORT_BY_DEVICE 1
83 static derive_t pagesize;
84 static _Bool report_by_device = 0;
85 /* #endif HAVE_SWAPCTL && HAVE_SWAPCTL_TWO_ARGS */
87 #elif HAVE_SWAPCTL && HAVE_SWAPCTL_THREE_ARGS
88 /* No global variables */
89 /* #endif HAVE_SWAPCTL && HAVE_SWAPCTL_THREE_ARGS */
91 #elif defined(VM_SWAPUSAGE)
92 /* No global variables */
93 /* #endif defined(VM_SWAPUSAGE) */
95 #elif HAVE_LIBKVM_GETSWAPINFO
96 static kvm_t *kvm_obj = NULL;
97 int kvm_pagesize;
98 /* #endif HAVE_LIBKVM_GETSWAPINFO */
100 #elif HAVE_LIBSTATGRAB
101 /* No global variables */
102 /* #endif HAVE_LIBSTATGRAB */
104 #elif HAVE_PERFSTAT
105 static int pagesize;
106 /*# endif HAVE_PERFSTAT */
108 #else
109 #error "No applicable input method."
110 #endif /* HAVE_LIBSTATGRAB */
112 static _Bool values_absolute = 1;
113 static _Bool values_percentage = 0;
115 static int swap_config(oconfig_item_t *ci) /* {{{ */
116 {
117 for (int i = 0; i < ci->children_num; i++) {
118 oconfig_item_t *child = ci->children + i;
119 if (strcasecmp("ReportBytes", child->key) == 0)
120 #if KERNEL_LINUX
121 cf_util_get_boolean(child, &report_bytes);
122 #else
123 WARNING("swap plugin: The \"ReportBytes\" option "
124 "is only valid under Linux. "
125 "The option is going to be ignored.");
126 #endif
127 else if (strcasecmp("ReportByDevice", child->key) == 0)
128 #if SWAP_HAVE_REPORT_BY_DEVICE
129 cf_util_get_boolean(child, &report_by_device);
130 #else
131 WARNING("swap plugin: The \"ReportByDevice\" option "
132 "is not supported on this platform. "
133 "The option is going to be ignored.");
134 #endif /* SWAP_HAVE_REPORT_BY_DEVICE */
135 else if (strcasecmp("ValuesAbsolute", child->key) == 0)
136 cf_util_get_boolean(child, &values_absolute);
137 else if (strcasecmp("ValuesPercentage", child->key) == 0)
138 cf_util_get_boolean(child, &values_percentage);
139 else
140 WARNING("swap plugin: Unknown config option: \"%s\"", child->key);
141 }
143 return (0);
144 } /* }}} int swap_config */
146 static int swap_init(void) /* {{{ */
147 {
148 #if KERNEL_LINUX
149 pagesize = (derive_t)sysconf(_SC_PAGESIZE);
150 /* #endif KERNEL_LINUX */
152 #elif HAVE_SWAPCTL && HAVE_SWAPCTL_TWO_ARGS
153 /* getpagesize(3C) tells me this does not fail.. */
154 pagesize = (derive_t)getpagesize();
155 /* #endif HAVE_SWAPCTL */
157 #elif defined(VM_SWAPUSAGE)
158 /* No init stuff */
159 /* #endif defined(VM_SWAPUSAGE) */
161 #elif HAVE_LIBKVM_GETSWAPINFO
162 char errbuf[_POSIX2_LINE_MAX];
164 if (kvm_obj != NULL) {
165 kvm_close(kvm_obj);
166 kvm_obj = NULL;
167 }
169 kvm_pagesize = getpagesize();
171 kvm_obj = kvm_openfiles(NULL, "/dev/null", NULL, O_RDONLY, errbuf);
173 if (kvm_obj == NULL) {
174 ERROR("swap plugin: kvm_openfiles failed, %s", errbuf);
175 return (-1);
176 }
177 /* #endif HAVE_LIBKVM_GETSWAPINFO */
179 #elif HAVE_LIBSTATGRAB
180 /* No init stuff */
181 /* #endif HAVE_LIBSTATGRAB */
183 #elif HAVE_PERFSTAT
184 pagesize = getpagesize();
185 #endif /* HAVE_PERFSTAT */
187 return (0);
188 } /* }}} int swap_init */
190 static void swap_submit_usage(char const *plugin_instance, /* {{{ */
191 gauge_t used, gauge_t free,
192 char const *other_name, gauge_t other_value) {
193 value_t v[1];
194 value_list_t vl = VALUE_LIST_INIT;
196 vl.values = v;
197 vl.values_len = STATIC_ARRAY_SIZE(v);
198 sstrncpy(vl.host, hostname_g, sizeof(vl.host));
199 sstrncpy(vl.plugin, "swap", sizeof(vl.plugin));
200 if (plugin_instance != NULL)
201 sstrncpy(vl.plugin_instance, plugin_instance, sizeof(vl.plugin_instance));
202 sstrncpy(vl.type, "swap", sizeof(vl.type));
204 if (values_absolute)
205 plugin_dispatch_multivalue(&vl, 0, DS_TYPE_GAUGE, "used", used, "free",
206 free, other_name, other_value, NULL);
207 if (values_percentage)
208 plugin_dispatch_multivalue(&vl, 1, DS_TYPE_GAUGE, "used", used, "free",
209 free, other_name, other_value, NULL);
210 } /* }}} void swap_submit_usage */
212 #if KERNEL_LINUX || HAVE_PERFSTAT
213 __attribute__((nonnull(1))) static void
214 swap_submit_derive(char const *type_instance, /* {{{ */
215 derive_t value) {
216 value_list_t vl = VALUE_LIST_INIT;
217 value_t v[1];
219 v[0].derive = value;
221 vl.values = v;
222 vl.values_len = STATIC_ARRAY_SIZE(v);
223 sstrncpy(vl.host, hostname_g, sizeof(vl.host));
224 sstrncpy(vl.plugin, "swap", sizeof(vl.plugin));
225 sstrncpy(vl.type, "swap_io", sizeof(vl.type));
226 sstrncpy(vl.type_instance, type_instance, sizeof(vl.type_instance));
228 plugin_dispatch_values(&vl);
229 } /* }}} void swap_submit_derive */
230 #endif
232 #if KERNEL_LINUX
233 static int swap_read_separate(void) /* {{{ */
234 {
235 FILE *fh;
236 char buffer[1024];
238 fh = fopen("/proc/swaps", "r");
239 if (fh == NULL) {
240 char errbuf[1024];
241 WARNING("swap plugin: fopen (/proc/swaps) failed: %s",
242 sstrerror(errno, errbuf, sizeof(errbuf)));
243 return (-1);
244 }
246 while (fgets(buffer, sizeof(buffer), fh) != NULL) {
247 char *fields[8];
248 int numfields;
249 char *endptr;
251 char path[PATH_MAX];
252 gauge_t total;
253 gauge_t used;
255 numfields = strsplit(buffer, fields, STATIC_ARRAY_SIZE(fields));
256 if (numfields != 5)
257 continue;
259 sstrncpy(path, fields[0], sizeof(path));
260 escape_slashes(path, sizeof(path));
262 errno = 0;
263 endptr = NULL;
264 total = strtod(fields[2], &endptr);
265 if ((endptr == fields[2]) || (errno != 0))
266 continue;
268 errno = 0;
269 endptr = NULL;
270 used = strtod(fields[3], &endptr);
271 if ((endptr == fields[3]) || (errno != 0))
272 continue;
274 if (total < used)
275 continue;
277 swap_submit_usage(path, used * 1024.0, (total - used) * 1024.0, NULL, NAN);
278 }
280 fclose(fh);
282 return (0);
283 } /* }}} int swap_read_separate */
285 static int swap_read_combined(void) /* {{{ */
286 {
287 FILE *fh;
288 char buffer[1024];
290 gauge_t swap_used = NAN;
291 gauge_t swap_cached = NAN;
292 gauge_t swap_free = NAN;
293 gauge_t swap_total = NAN;
295 fh = fopen("/proc/meminfo", "r");
296 if (fh == NULL) {
297 char errbuf[1024];
298 WARNING("swap plugin: fopen (/proc/meminfo) failed: %s",
299 sstrerror(errno, errbuf, sizeof(errbuf)));
300 return (-1);
301 }
303 while (fgets(buffer, sizeof(buffer), fh) != NULL) {
304 char *fields[8];
305 int numfields;
307 numfields = strsplit(buffer, fields, STATIC_ARRAY_SIZE(fields));
308 if (numfields < 2)
309 continue;
311 if (strcasecmp(fields[0], "SwapTotal:") == 0)
312 strtogauge(fields[1], &swap_total);
313 else if (strcasecmp(fields[0], "SwapFree:") == 0)
314 strtogauge(fields[1], &swap_free);
315 else if (strcasecmp(fields[0], "SwapCached:") == 0)
316 strtogauge(fields[1], &swap_cached);
317 }
319 fclose(fh);
321 if (isnan(swap_total) || isnan(swap_free))
322 return (ENOENT);
324 /* Some systems, OpenVZ for example, don't provide SwapCached. */
325 if (isnan(swap_cached))
326 swap_used = swap_total - swap_free;
327 else
328 swap_used = swap_total - (swap_free + swap_cached);
329 assert(!isnan(swap_used));
331 if (swap_used < 0.0)
332 return (EINVAL);
334 swap_submit_usage(NULL, swap_used * 1024.0, swap_free * 1024.0,
335 isnan(swap_cached) ? NULL : "cached",
336 isnan(swap_cached) ? NAN : swap_cached * 1024.0);
337 return (0);
338 } /* }}} int swap_read_combined */
340 static int swap_read_io(void) /* {{{ */
341 {
342 FILE *fh;
343 char buffer[1024];
345 _Bool old_kernel = 0;
347 uint8_t have_data = 0;
348 derive_t swap_in = 0;
349 derive_t swap_out = 0;
351 fh = fopen("/proc/vmstat", "r");
352 if (fh == NULL) {
353 /* /proc/vmstat does not exist in kernels <2.6 */
354 fh = fopen("/proc/stat", "r");
355 if (fh == NULL) {
356 char errbuf[1024];
357 WARNING("swap: fopen: %s", sstrerror(errno, errbuf, sizeof(errbuf)));
358 return (-1);
359 } else
360 old_kernel = 1;
361 }
363 while (fgets(buffer, sizeof(buffer), fh) != NULL) {
364 char *fields[8];
365 int numfields;
367 numfields = strsplit(buffer, fields, STATIC_ARRAY_SIZE(fields));
369 if (!old_kernel) {
370 if (numfields != 2)
371 continue;
373 if (strcasecmp("pswpin", fields[0]) == 0) {
374 strtoderive(fields[1], &swap_in);
375 have_data |= 0x01;
376 } else if (strcasecmp("pswpout", fields[0]) == 0) {
377 strtoderive(fields[1], &swap_out);
378 have_data |= 0x02;
379 }
380 } else /* if (old_kernel) */
381 {
382 if (numfields != 3)
383 continue;
385 if (strcasecmp("page", fields[0]) == 0) {
386 strtoderive(fields[1], &swap_in);
387 strtoderive(fields[2], &swap_out);
388 }
389 }
390 } /* while (fgets) */
392 fclose(fh);
394 if (have_data != 0x03)
395 return (ENOENT);
397 if (report_bytes) {
398 swap_in = swap_in * pagesize;
399 swap_out = swap_out * pagesize;
400 }
402 swap_submit_derive("in", swap_in);
403 swap_submit_derive("out", swap_out);
405 return (0);
406 } /* }}} int swap_read_io */
408 static int swap_read(void) /* {{{ */
409 {
410 if (report_by_device)
411 swap_read_separate();
412 else
413 swap_read_combined();
415 swap_read_io();
417 return (0);
418 } /* }}} int swap_read */
419 /* #endif KERNEL_LINUX */
421 /*
422 * Under Solaris, two mechanisms can be used to read swap statistics, swapctl
423 * and kstat. The former reads physical space used on a device, the latter
424 * reports the view from the virtual memory system. It was decided that the
425 * kstat-based information should be moved to the "vmem" plugin, but nobody
426 * with enough Solaris experience was available at that time to do this. The
427 * code below is still there for your reference but it won't be activated in
428 * *this* plugin again. --octo
429 */
430 #elif 0 && HAVE_LIBKSTAT
431 /* kstat-based read function */
432 static int swap_read_kstat(void) /* {{{ */
433 {
434 gauge_t swap_alloc;
435 gauge_t swap_resv;
436 gauge_t swap_avail;
438 struct anoninfo ai;
440 if (swapctl(SC_AINFO, &ai) == -1) {
441 char errbuf[1024];
442 ERROR("swap plugin: swapctl failed: %s",
443 sstrerror(errno, errbuf, sizeof(errbuf)));
444 return (-1);
445 }
447 /*
448 * Calculations from:
449 * http://cvs.opensolaris.org/source/xref/on/usr/src/cmd/swap/swap.c
450 * Also see:
451 * http://www.itworld.com/Comp/2377/UIR980701perf/ (outdated?)
452 * /usr/include/vm/anon.h
453 *
454 * In short, swap -s shows: allocated + reserved = used, available
455 *
456 * However, Solaris does not allow to allocated/reserved more than the
457 * available swap (physical memory + disk swap), so the pedant may
458 * prefer: allocated + unallocated = reserved, available
459 *
460 * We map the above to: used + resv = n/a, free
461 *
462 * Does your brain hurt yet? - Christophe Kalt
463 *
464 * Oh, and in case you wonder,
465 * swap_alloc = pagesize * ( ai.ani_max - ai.ani_free );
466 * can suffer from a 32bit overflow.
467 */
468 swap_alloc = (gauge_t)((ai.ani_max - ai.ani_free) * pagesize);
469 swap_resv = (gauge_t)((ai.ani_resv + ai.ani_free - ai.ani_max) * pagesize);
470 swap_avail = (gauge_t)((ai.ani_max - ai.ani_resv) * pagesize);
472 swap_submit_usage(NULL, swap_alloc, swap_avail, "reserved", swap_resv);
473 return (0);
474 } /* }}} int swap_read_kstat */
475 /* #endif 0 && HAVE_LIBKSTAT */
477 #elif HAVE_SWAPCTL && HAVE_SWAPCTL_TWO_ARGS
478 /* swapctl-based read function */
479 static int swap_read(void) /* {{{ */
480 {
481 swaptbl_t *s;
482 char *s_paths;
483 int swap_num;
484 int status;
486 gauge_t avail = 0;
487 gauge_t total = 0;
489 swap_num = swapctl(SC_GETNSWP, NULL);
490 if (swap_num < 0) {
491 ERROR("swap plugin: swapctl (SC_GETNSWP) failed with status %i.", swap_num);
492 return (-1);
493 } else if (swap_num == 0)
494 return (0);
496 /* Allocate and initialize the swaptbl_t structure */
497 s = malloc(swap_num * sizeof(swapent_t) + sizeof(struct swaptable));
498 if (s == NULL) {
499 ERROR("swap plugin: malloc failed.");
500 return (-1);
501 }
503 /* Memory to store the path names. We only use these paths when the
504 * separate option has been configured, but it's easier to just
505 * allocate enough memory in any case. */
506 s_paths = calloc(swap_num, PATH_MAX);
507 if (s_paths == NULL) {
508 ERROR("swap plugin: calloc failed.");
509 sfree(s);
510 return (-1);
511 }
512 for (int i = 0; i < swap_num; i++)
513 s->swt_ent[i].ste_path = s_paths + (i * PATH_MAX);
514 s->swt_n = swap_num;
516 status = swapctl(SC_LIST, s);
517 if (status < 0) {
518 char errbuf[1024];
519 ERROR("swap plugin: swapctl (SC_LIST) failed: %s",
520 sstrerror(errno, errbuf, sizeof(errbuf)));
521 sfree(s_paths);
522 sfree(s);
523 return (-1);
524 } else if (swap_num < status) {
525 /* more elements returned than requested */
526 ERROR("swap plugin: I allocated memory for %i structure%s, "
527 "but swapctl(2) claims to have returned %i. "
528 "I'm confused and will give up.",
529 swap_num, (swap_num == 1) ? "" : "s", status);
530 sfree(s_paths);
531 sfree(s);
532 return (-1);
533 } else if (swap_num > status)
534 /* less elements returned than requested */
535 swap_num = status;
537 for (int i = 0; i < swap_num; i++) {
538 char path[PATH_MAX];
539 gauge_t this_total;
540 gauge_t this_avail;
542 if ((s->swt_ent[i].ste_flags & ST_INDEL) != 0)
543 continue;
545 this_total = (gauge_t)(s->swt_ent[i].ste_pages * pagesize);
546 this_avail = (gauge_t)(s->swt_ent[i].ste_free * pagesize);
548 /* Shortcut for the "combined" setting (default) */
549 if (!report_by_device) {
550 avail += this_avail;
551 total += this_total;
552 continue;
553 }
555 sstrncpy(path, s->swt_ent[i].ste_path, sizeof(path));
556 escape_slashes(path, sizeof(path));
558 swap_submit_usage(path, this_total - this_avail, this_avail, NULL, NAN);
559 } /* for (swap_num) */
561 if (total < avail) {
562 ERROR(
563 "swap plugin: Total swap space (%g) is less than free swap space (%g).",
564 total, avail);
565 sfree(s_paths);
566 sfree(s);
567 return (-1);
568 }
570 /* If the "separate" option was specified (report_by_device == 1), all
571 * values have already been dispatched from within the loop. */
572 if (!report_by_device)
573 swap_submit_usage(NULL, total - avail, avail, NULL, NAN);
575 sfree(s_paths);
576 sfree(s);
577 return (0);
578 } /* }}} int swap_read */
579 /* #endif HAVE_SWAPCTL && HAVE_SWAPCTL_TWO_ARGS */
581 #elif HAVE_SWAPCTL && HAVE_SWAPCTL_THREE_ARGS
582 static int swap_read(void) /* {{{ */
583 {
584 struct swapent *swap_entries;
585 int swap_num;
586 int status;
588 gauge_t used = 0;
589 gauge_t total = 0;
591 swap_num = swapctl(SWAP_NSWAP, NULL, 0);
592 if (swap_num < 0) {
593 ERROR("swap plugin: swapctl (SWAP_NSWAP) failed with status %i.", swap_num);
594 return (-1);
595 } else if (swap_num == 0)
596 return (0);
598 swap_entries = calloc(swap_num, sizeof(*swap_entries));
599 if (swap_entries == NULL) {
600 ERROR("swap plugin: calloc failed.");
601 return (-1);
602 }
604 status = swapctl(SWAP_STATS, swap_entries, swap_num);
605 if (status != swap_num) {
606 ERROR("swap plugin: swapctl (SWAP_STATS) failed with status %i.", status);
607 sfree(swap_entries);
608 return (-1);
609 }
611 #if defined(DEV_BSIZE) && (DEV_BSIZE > 0)
612 #define C_SWAP_BLOCK_SIZE ((gauge_t)DEV_BSIZE)
613 #else
614 #define C_SWAP_BLOCK_SIZE 512.0
615 #endif
617 /* TODO: Report per-device stats. The path name is available from
618 * swap_entries[i].se_path */
619 for (int i = 0; i < swap_num; i++) {
620 if ((swap_entries[i].se_flags & SWF_ENABLE) == 0)
621 continue;
623 used += ((gauge_t)swap_entries[i].se_inuse) * C_SWAP_BLOCK_SIZE;
624 total += ((gauge_t)swap_entries[i].se_nblks) * C_SWAP_BLOCK_SIZE;
625 }
627 if (total < used) {
628 ERROR(
629 "swap plugin: Total swap space (%g) is less than used swap space (%g).",
630 total, used);
631 sfree(swap_entries);
632 return (-1);
633 }
635 swap_submit_usage(NULL, used, total - used, NULL, NAN);
637 sfree(swap_entries);
638 return (0);
639 } /* }}} int swap_read */
640 /* #endif HAVE_SWAPCTL && HAVE_SWAPCTL_THREE_ARGS */
642 #elif defined(VM_SWAPUSAGE)
643 static int swap_read(void) /* {{{ */
644 {
645 int mib[3];
646 size_t mib_len;
647 struct xsw_usage sw_usage;
648 size_t sw_usage_len;
650 mib_len = 2;
651 mib[0] = CTL_VM;
652 mib[1] = VM_SWAPUSAGE;
654 sw_usage_len = sizeof(struct xsw_usage);
656 if (sysctl(mib, mib_len, &sw_usage, &sw_usage_len, NULL, 0) != 0)
657 return (-1);
659 /* The returned values are bytes. */
660 swap_submit_usage(NULL, (gauge_t)sw_usage.xsu_used,
661 (gauge_t)sw_usage.xsu_avail, NULL, NAN);
663 return (0);
664 } /* }}} int swap_read */
665 /* #endif VM_SWAPUSAGE */
667 #elif HAVE_LIBKVM_GETSWAPINFO
668 static int swap_read(void) /* {{{ */
669 {
670 struct kvm_swap data_s;
671 int status;
673 gauge_t used;
674 gauge_t total;
676 if (kvm_obj == NULL)
677 return (-1);
679 /* only one structure => only get the grand total, no details */
680 status = kvm_getswapinfo(kvm_obj, &data_s, 1, 0);
681 if (status == -1)
682 return (-1);
684 total = (gauge_t)data_s.ksw_total;
685 used = (gauge_t)data_s.ksw_used;
687 total *= (gauge_t)kvm_pagesize;
688 used *= (gauge_t)kvm_pagesize;
690 swap_submit_usage(NULL, used, total - used, NULL, NAN);
692 return (0);
693 } /* }}} int swap_read */
694 /* #endif HAVE_LIBKVM_GETSWAPINFO */
696 #elif HAVE_LIBSTATGRAB
697 static int swap_read(void) /* {{{ */
698 {
699 sg_swap_stats *swap;
701 swap = sg_get_swap_stats();
702 if (swap == NULL)
703 return (-1);
705 swap_submit_usage(NULL, (gauge_t)swap->used, (gauge_t)swap->free, NULL, NAN);
707 return (0);
708 } /* }}} int swap_read */
709 /* #endif HAVE_LIBSTATGRAB */
711 #elif HAVE_PERFSTAT
712 static int swap_read(void) /* {{{ */
713 {
714 perfstat_memory_total_t pmemory = {0};
715 int status;
717 gauge_t total;
718 gauge_t free;
719 gauge_t reserved;
721 status =
722 perfstat_memory_total(NULL, &pmemory, sizeof(perfstat_memory_total_t), 1);
723 if (status < 0) {
724 char errbuf[1024];
725 WARNING("swap plugin: perfstat_memory_total failed: %s",
726 sstrerror(errno, errbuf, sizeof(errbuf)));
727 return (-1);
728 }
730 total = (gauge_t)(pmemory.pgsp_total * pagesize);
731 free = (gauge_t)(pmemory.pgsp_free * pagesize);
732 reserved = (gauge_t)(pmemory.pgsp_rsvd * pagesize);
734 swap_submit_usage(NULL, total - free, free, "reserved", reserved);
735 swap_submit_derive("in", (derive_t)pmemory.pgspins * pagesize);
736 swap_submit_derive("out", (derive_t)pmemory.pgspouts * pagesize);
738 return (0);
739 } /* }}} int swap_read */
740 #endif /* HAVE_PERFSTAT */
742 void module_register(void) {
743 plugin_register_complex_config("swap", swap_config);
744 plugin_register_init("swap", swap_init);
745 plugin_register_read("swap", swap_read);
746 } /* void module_register */
748 /* vim: set fdm=marker : */